20022022210121 has 4 divisors (see below), whose sum is σ = 20024044442244. Its totient is φ = 20019999978000.

The previous prime is 20022022210097. The next prime is 20022022210163. The reversal of 20022022210121 is 12101222022002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9795867127225 + 10226155082896 = 3129835^2 + 3197836^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022022210121 - 2¹⁴ = 20022022193737 is a prime.

It is a super-4 number, since 4×20022022210121⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022022210121.

It is not an unprimeable number, because it can be changed into a prime (20022022230121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011101210 + ... + 1011121011.

It is an arithmetic number, because the mean of its divisors is an integer number (5006011110561).

Almost surely, 2^{20022022210121} is an apocalyptic number.

It is an amenable number.

20022022210121 is a deficient number, since it is larger than the sum of its proper divisors (2022232123).

20022022210121 is an equidigital number, since it uses as much as digits as its factorization.

20022022210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022232122.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20022022210121 its reverse (12101222022002), we get a palindrome (32123244232123).

The spelling of 20022022210121 in words is "twenty trillion, twenty-two billion, twenty-two million, two hundred ten thousand, one hundred twenty-one".